Vegetable pods are a type of pest that damages rapeseed plants. These pests include common radish sprouts, cabbage sprouts, and peach amaranth, which often attack the same crops together. They feed on the sap of the rapeseed, causing the leaves to curl downward, the plants to turn yellow, and the overall growth to become stunted. In severe cases, the plants may wilt and even die.
The cabbage caterpillar is the larval stage of the cabbage moth, which is particularly harmful to rapeseed. The first instar larvae feed on the upper surface of the leaves, while older larvae consume the foliage, creating holes in the leaves. In heavy infestations, only the petioles and veins may remain.
Vegetable pods also refer to the larvae of the diamondback moth, which damage rapeseed by burrowing into the leaf tissue or stems from the back of the plant. This feeding activity can lead to irregular damage and weaken the plant’s structure.
Black-shelled insects are a group of beetles that harm rapeseed crops. Their larvae typically feed on the underside of the leaves and the heart of the plant, causing holes and notches on the foliage. Severe infestations can leave only the petioles and veins intact.
To control these pests, farmers can use a solution of fresh high-fat membrane mixed with 40% omethoate diluted at 800–1000 times, or apply 50% anti-influx at a rate of 10 grams per 50 liters of water. Other options include using fresh high-fat membrane combined with 90% trichlorfon or 80% dichlorvos EC, diluted at 800–1000 times. Additionally, 2.5% insecticide, 2.5% cypermethrin, and 20% chlorpyrifos can be used in combination. Since most of these pests primarily affect the leaves and the growing center of the plant, it's important to spray thoroughly on both the upper and lower surfaces of the leaves, as well as the heart of the plant. Regular monitoring and timely application of pesticides are essential to prevent serious infestations and ensure healthy crop development.
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